Setting gauge for toothed wheels



y 1956 A. A. BUDNICK 2,746,161

SETTING GAUGE FOR TOOTHED WHEELS Filed July 18, 1952 United SETTING GAUGE FOR TOQTHED 'WIEELS AruoAugustBudnick, Dusseldorf, Germany, assignor to .S h essA- G-, i s e -her s Germany Application July 18, 1952, Serial No. 299,694

Claims. (C1. 33- 185) Ihe present invention relates to ,a method of and device tor placing a workpiece provided withteeth, especial ya gear wheel, r l tive 10a s e n m mber P ovi wi h te h, spe i y a a tting tool, to fu th mach ning p ati ns- In order to subject the teethof the gear wheel .to .a

,not possible to achieve such placing or adjustment by direct enga ement f the gear wheel wi h he t l.

t i the efo e, an obje of h P esent inven i n to pro de an range fo n m t od of c urately and reliably placing two toothed members relative to each th fo furth r m chin n pe sith hi an u the bj s in v ord ng to th pr sen in ntio a u e h i rs h ond eeth mea s is p id d, t e fi th means f 1 i ro ht i to m sh ith t a h el o t 11 to be m h ned ur he While said second t eth mea is brought into mesh with the gear-cutting tool or the like. 'lfhe positions of said first and second tooth means are thencompared with each other, for instance, by a measuring scale. Since the dimensions of the tooth means on said gauge are known and the positions of the tooth means of'the gear-cutting tool and of the gear wheel are defined bythe gauge, the-problem of placing a gear and .a gear cutter relative to each other is reducedto the problem of setting two tooth means of a gauge in proper relation to each other.

This problem can be solved in a very simple way if gear racks are'used as gauge tooth means and care is takenthat the planes tangent to the crests of the gauge tooth means are always parallel to each other. To this end, according to the setting device of the present'inyen- "tion, the two gauge tooth means are connected to a carrier common to both.

Otherand further objects, features and advantages of the invention will be pointed out hereinafter and appear in the appended claims forming part of the application. In the accompanying drawings two preferred embodiments of the invention are shown by way of example and not by way of limitation.

' Fig. l is anisometric view of a gauge according to the invention, the elements of said gauge being shown in exploded view for sake of clarity.

Fig. 2 is aside viewand fragmentary section of an arrangement showing :the gauge in operation, one tooth means being in mesh with a gear-cutting tool and the other tool means meshing with a gear wheel.

Fig. 3 is'a plan view of Pig. 2.

Fig. 4 is a plan view of a modified gauge according to the-invention.

Similar reference numerals denote similar partsin the difierent'views.

"Referring now to'thc drawings-in detail and Figs. -1 to 3 thereof in particular, it will be seen that the gauge comprises a plate 3 having its top and bottom surfaces parallel to each other. Projecting ,from plate 3 are parts ,3 between which is slidably mounted, by means of a dovetail guide 18, a slide 19 from WhiQ aprpjects. .,;a gaugextooth 5. The position of the slide 1 9 within the guide 18 is being indicated by the position pf ;a mark -7 relative to ascale 8. Fastened to the ,bottomsurta of plate is a member 21, shown separately for thesak :Qf la ty h h o p two p j ting teeth 4 defi in between them Vatooth space 22. 'Theplanes of symmetry of gauge tooth 5 and of the gauge toothspaee 22 are arranged so as to coincide with each other. 'Iwo handles 17 may be p i e for m iP lathgthe device- .The op at o o the g aee e to th invent ng, will n he desc i d in nn ion th F gs-.2 n 3 Accord ng t gthe gearutting t l is elevated position with regard to gear wheel 2-.-w hi ;is to be mach n d f rt h p a e s ne P t en th gear wheel 2 in such a way that the teeth 4 engage the h we n one te h of the gear wh el Ne h slide 19 is advanced by hand until gauge tooth 5 will engage the tooth space between two adjacent teeth 9f the cutting tool 1. Simultaneously, the position-ot the mark 7 relative to the ,scale 8 is read. positionis changed by rotation of the wheels 1 and 2. when the rel po i ion o wh l 1 an 1 has :bee va ies a h h t eth 5 n be an d fa th st i te hea iacent tooth space of the gear-cutting tool 1, the ,se g

. o wh l 1 and 2 ha be n e mpl ed- Ne th am. a

of subsequent machining can be seton the sca1e,,8 by advancing the wheel toward the tool 1 accordingly.

As indicated in Fig. 3, it is also possible toproyidcs'n addition to or instead of the scale 8, a .dial indicator permitting a more accurate reading and measurement. M o the sens m y be so de gne ha th 1st ds of the plate ,3 form a carriage or slide which is longitudinally slidable in adovetail guide 24 of .p1ate 3g,-a snark 25 permitting to read on a scale 26 the position of-the slide on the plate. The zero position, i. e. the position where the .plane of symmetry of the gauge-tooth .5 is'in alignment with the plane of symmetry of the tooth space 22 may be especially marked. It will be understood that such longitudinal or rather tangential sliding of 10ml? w l fur her facilitate th se t g of the gear wheel-.z'wi h regard to the gear-cutting tool 1.

Ref rr ng w to h m difi t o h WIlfil lFiE-4, it w ll be s n h n hi ase springs are-p ovided hi h urg th th 5 h ug the e ven enotsn iaeurg pin .1 nd a p i f l ver lla o a ance. to ard th cutt ng o l- Th v s 11 m ya s bensedfer manually withdrawing the toothS, for instance, when'the gauge tooth 5 during the adjustmentof the gaugegisto be in erte a d a juste be en th t eth of th ee tt g tool. The levers 11 engage in recesses 26a onboth sides of .a slide 12 which is guidedin the gauge parallel tothe p an of sy e ry o th e h 1t gu de tripsmd h s v p a e of th ga h e beenr meved .an the connecting means therefor are likewise not shown in; the rawine- "I h shaft 3 of th e th :5 h u fie .e.n Play in a gr e eh p r s in h ottom su fa e .0f,.. 1i.de .12 as to be a to swivel thr ugh a er ain ahgle ahou the pi 5 in the sli 12- The teeth 5 ,isinits correct position, when its mark 15 aligns with the mark 1. "Moreover, e p iti of the m k ..in relat onto ss i t -s h n) r pond ng te heseale't of Fig. 3, has to be observed. 'Due to the pivotal mounting of tooth 5, it is ensured that its flan'lgs will reliably engage the flanks of the gear cutting t o o l 1. The laterally arranged handles 17 permit easy handling of the gauge and easy reading of the scale.

it will be understood that the gauge shown in'Fig'. 4

of the two gauge tooth means must be observed. necessary thatnot only the teeth of the gauge tooth means 'DD defined by the axes of the wheels. plies to all spur gears.

- could also be modified in such a way that the tooth inand 16 also would have to indicate the central position of the tooth 5 in the slide 12. The direction of transverse sliding suitably would be perpendicular to that of the I slide 12 in relation to plate 3, i. e., parallel toa plane 22 of the other gauge tooth means 4. Moreover the disstance e between the planes BB and CC of the crests It is are properly aligned with regard to each other as to their planes AA but also their crest planes B-B and CC -must form a right angle with the plane DD passing through the two axes (of the workpiece and of the tool) and their center planes AA must be parallel to the plane DD to ensure that the teeth of the wheels 1 and 2 are not ofiset with regard to each other.

The distance between the crest planes BB and CC is at a maximum when said planes'are disposed at rightangles to the plane This law ap- In case of a helical gear Wheel and a hobber, e. g., the crest planes of the two axes of the wheels 1 and 2 must be parallel and they have their maximum distance e from each other in this case. Therethat the maximum distance e between the planes BB and CC within the gauge teeth is found out by rotating the wheel 2 and the tool 1 and tilting the gauge tooth means 5. This value then determines the amount by which the wheel has to be machined. This amount will be zero if the planes tangent to the crests of the gauge tooth means coincide with each other and a meshing without play is required. It is not necessary that the gauge tooth means have the same pressure or obliquity or generating angle of tooth profile as the teeth of the tool 1 and of the gear wheel 2. They may difier in this respect provided that the thickness of these teeth or the width of their tooth space, and possibly their spiral angle, are dimensioned accordingly. Their relative position, at which the amount of post-machining is zero, may be defined by marks.

--While the invention has been described in detail with respect to two now preferred examples and embodiments of the invention it will be understood by those skilled in the art after understanding the invention that various changes and modifications may be made without departing from the spirit and scope of the invention and it is intended, therefore, to cover all such changes and modithe other .one of said two major surfaces of said plate,

the crests of said first and second gauge tooth means being directed toward each other, said second gauge tooth means being arranged to enter a tooth space of said cutting tool and also beingmovable to bring its plane of symmetry into alignment with the plane of symmetry of said first gauge tooth means, and means indicating the deviation of the plane of symmetry of said second gauge tooth means relative to the plane of symmetry of said first gauge tooth means.

2. A device for setting a cutting tool relative to a toothed work piece for correcting the teeth of the latter,

being arranged so as to have their crests directed toward each other; and means associatedwith the first tooth means and arranged to enable said first tooth means to move into a position in which its plane of symmetry coincides with that of said secnd tooth means and also to move said first tooth means relative to said cutting tool in radial direction of the latter to thereby make it possible to ascertain the deepest point of penetration of said first tooth means between the teeth of said cutting tool.

3. A gauge for placing a toothed workpiece, the teeth of which are to be machined further, relative to a cutting tool, which includes: a carrier, a first gauge tooth means fixedly connected to one side of said carrier and arranged for meshing engagement with the workpiece theteeth of which have to be machined further, a second gauge tooth means movably mounted on the opposite side of said carrier for meshing engagement with the cutting tool while being vertically spaced from said first-gauge tooth means, said second gauge tooth means being movable into position so as to have a common plane of symmetry with said first gauge tooth means, the crest of the movable gauge tooth' means being spaceable inwardly relative'to the crest of said fixed tooth means by a distance approaching its maximum as the crest of said movable gauge tooth means approaches the root of said fixed gauge tooth means. 7

4. A gauge for placing a toothed workpiece, the teeth of which are to be machined further, relative to a cutting tool, which includes: a carrier plate, a first gauge tooth means fixedly connected to one side of said carrier plate and arranged for meshing engagement with the workpiece the teeth of which have to be machined further, a second gauge tooth means mounted on the opposite side of said carrier plate for meshing engagement with the cutting tool while being vertically spaced from said first gauge tooth means, said second gauge tooth means being movable into a position in which it has a common plane of symmetry with said first gauge tooth means, the crests of said first and second gauge tooth means being directed toward each other, and means for adjusting the crest of said second gauge tooth means relative to said first gauge tooth means.

5. A gauge for placing a toothed-workpiece, the teeth of which are to be machined further, relative to a cutting tool, which includes: a carrier plate with parallel top and bottom surfaces, first gauge tooth means fixedly connected to the bottom side of said carrier plate and adapted to be brought into meshing engagement with said workpiece, second gauge tooth means movably mounted on the top surface of said carrier plate and movable relative to said first gauge tooth means for meshing engagement with said cutting tool, the crests of said first and second gauge tooth means being directed toward each other, said second gauge tooth means also being movable so as to bring its plane of symmetry into alignment with the plane of symmetry of said first gauge tooth means, and means for indicating the respective'distance between the crests of said first and said second gauge tooth means.

6. A gauge for placing a toothed workpiece, the teeth of which are to be machined further, relative to a cutting tool, which includes: a carrier plate, first gauge tooth means fixedly connected to the bottom of said carrier plate and adapted to be brought into meshing engagement with the workpiece the teeth of which have to be machined further, a second gauge tooth means movablymounted on the top side of said carrier plate, said second gauge tooth means being movable into meshing engagement with said cutting tool and also being movable relative to said first gauge tooth means so as to have a common plane of symmetry with said first gauge tooth means, the crests of said first and second gauge tooth means being directed toward each other, and means for varying the distance of the crest of said second gauge tooth means relative to the crest of said first gauge tooth means.

7. A gauge for placing a toothed workpiece the teeth of which are to be machined further relative to a cutting tool, which includes: a carrier plate, first gauge tooth means fixedly connected to the bottom side of said carrier plate and adapted to be brought into meshing engagement with the workpiece the teeth of which have to be machined further, a slide slidably mounted on the top surface of said carrier plate, and second gauge tooth means carried by said slide and adapted to be brought into meshing engagement with said cutting tool, said second gauge tooth means being pivotally connected to said slide to allow pivoting said second gauge tooth means into a position in which its plane of symmetry coincides with the plane of symmetry of said first gauge tooth means, the crests of said first and second gauge tooth means being directed toward each other.

8. A gauge for placing a toothed workpiece, the teeth of which are to be machined further, relative to a cutting tool, which includes: a carrier plate, first gauge tooth means fixedly connected to the bottom side of said carrier plate and adapted to be brought into meshing engagement with the workpiece the teeth of which have to be cut further, first slide means slidably mounted on the top surface of said cam'er plate, second gauge tooth means carried by said slide and adapted to be brought into mesh ing engagement with said cutting tool, said second gauge tooth means being pivotally connected to said slide to allow pivon'ng said second gauge tooth means into a position in which its plane of symmetry coincides with the plane of symmetry of said first gauge tooth means, the crests of said first and second gauge tooth means being directed toward each other, and second slide means mounted on the top surface of said carrier plate and arranged for moving said first slide means in a direction transverse to the movement of said first slide means.

9. A gauge for placing a toothed workpiece, the teeth of which are to be machined further, relative to a cutting tool having a plurality of teeth, which includes: a carrier plate, first gauge tooth means fixedly but detachably connected to the bottom side of said carrier plate and arranged for meshing engagement with the workpiece the teeth of which have to be machined further, second gauge tooth means arranged for meshing engagement with the cutting tool and movable relative thereto, said second gauge tooth means also being movable relative to said first gauge tooth means so as to have a common plane of symmetry with said first gauge tooth means, the crests of said first and second gauge tooth means being directed toward each other, and means for measuring the deepest penetration of said second gauge tooth means into a tooth space between two adjacent teeth of said cutting tool.

10. A gauge for placing a toothed workpiece, the teeth of which are to be machined further, relative to a cutting tool having a plurality of teeth, which includes: a carrier plate, first gauge tooth means designed as a rack and fixedly connected to the bottom side of said carrier plate, said first gauge tooth means being adapted to be brought into meshing engagement with the workpiece the teeth of which have to be machined further, second gauge tooth means arranged on the top side of said carrier plate, said second gauge tooth means being designed as a single tooth and being movable relative to said cutting tool for engaging a tooth space of the latter, said second gauge tooth means also being movable relative to said first gauge tooth means so as to bring its plane of symmetry into alignment with the plane of symmetry of said first gauge tooth means, the crests of said first and second gauge tooth means being directed toward each other, and means for measuring the penetration of said second gauge tooth means into the tooth space between two adjacent teeth of said cutting tool.

References Cited in the file of this patent UNITED STATES PATENTS 1,034,927 Oehler Aug. 6, 1912 2,379,406 Alvis July 3, 1945 2,468,395 Fredin Apr. 26, 1949 2,561,534 Parker et al. July 24, 1951 2,618,071 Davis et al. Nov. 18, 1952 

